As some would say: Realization is the first step to change ... and actually wanting to change earns you my respect already.
Changing itself is not easy though. Don't let this stop you, go forward with it, and at some point, someone might actually tell you, that you have changed.
Until then, I shall be rooting for you. Good luck.

P.S.: There is one tip I can give you: Check your own actions as frequently as possible. If you manage that, you will certainly succeed.